* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;

}

body {
  background-color: #f5f5f5;
}

.app {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}